RxAndroidBle Multiple Characteristic Notifications and Read/Write

Question

I'm having issues setting up notifications on multiple characteristics. I've reviewed the documentation and many of the examples only cover very granular situations.

My use case is as follows: 1. scan for devices 2. user selects device to connect to (with the connection persisting until the app is closed) 3. subscribe to notifications for many characteristics 4. read/write to either single characteristics at a time, and in some cases read/write to many characteristics at a time

Have you tried to write some code? Create a flow of data to suit your needs? — Dariusz Seweryn, May 08 '17 at 21:12

score 1 · Answer 1 · answered Jun 12 '17 at 20:47

1

I got it working now. The issue was I needed to be working with an instance of RxBleConnection for later connectivity

answered Jun 12 '17 at 20:47

lorenzo

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can you share the code you used to get this working? I'm running into the same thing. – Nelson Ramirez Sep 22 '18 at 00:44

score 1 · Answer 2 · edited Apr 03 '20 at 13:52

this my solution for multiple write

 mConnObservable.flatMapSingle(rxBleConnection -> {
        return rxBleConnection.writeCharacteristic(SSID, mSsidView.getText().toString().getBytes())
                .flatMap(ssidBytes -> rxBleConnection.writeCharacteristic(SSID2, mPassPhrase.getText().toString().getBytes())
                .flatMap(ssid2Bytes -> rxBleConnection.writeCharacteristic(SSID3, mSecurityModeSpinner.getSelectedItem().toString().getBytes())));
    })
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(ssid3Bytes -> {
               //do something
            }, this::onError, this::onComplete);

you should put the other flatMap operations in first flatMap, beacause you can only get rxBleConnection in first flatMap

Original solution for RxAndroidBle RxJava 1 version:

 mConnObservable.flatMap(rxBleConnection -> {
        return rxBleConnection.writeCharacteristic(SSID, mSsidView.getText().toString().getBytes())
                .flatMap(ssidBytes -> rxBleConnection.writeCharacteristic(SSID2, mPassPhrase.getText().toString().getBytes())
                .flatMap(ssid2Bytes -> rxBleConnection.writeCharacteristic(SSID3, mSecurityModeSpinner.getSelectedItem().toString().getBytes())));
    })
            .observeOn(AndroidSchedulers.mainThread())
            .subscribe(ssid3Bytes -> {
               //do something
            }, this::onError, this::onComplete);

RxAndroidBle Multiple Characteristic Notifications and Read/Write

2 Answers2

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